Get used to playing with a relaxed hand with Wonderthumb, a unique left-hand aid. By residing in the ''Mouse House'', Wonderthumb keeps the neck of the instrument in the correct position, while keeping your fingers free to play. Use Wonderthumb to open up your left hand and maintain proper form!
Small size - fits thumbs 50mm to 55mm in circumference
- For Violin or Viola
- Made in USA
WonderThumb Sizing Sheet